Consider two manufacturers, Each makes a product. The two products are partial substitutes. Priced at p_t, product i receives a demand q_1 = 15 - 2 p_1 + p_2 and q_2 = 15 - 2 p_2 + p_1. It costs $5 to produce a unit of product 1 and $10 to produce a unit of product 2. Derive the equilibrium prices and profits. How much revenue advantage does company 1's cost advantage lead to?